| 摘要 |
PURPOSE:To constitute a load switching device that switches the state of load by operation of one power source switch small, light and at low cost by switching load using a thermal switch. CONSTITUTION:When a power source switch 2 is made on, current flows through a heater 38 and a diode D3, and a TR1 is made on. Thereby, a heater 37 is heated and a thermal switch 33 is closed, and accordingly, current is applied to a load 31. When the power source switch 2 is cut off and made again within a fixed time, a TR2 becomes conductive first as the thermal switch 33 is closed. Accordingly, the heater 38 is heated, a thermal switch 35 is closed and the current is applied to the load 32. After a fixed time, the thermal switch 33 becomes unable to maintain closing, and the load 31 stops operation. Accordingly, the operation mode of loads 31, 32 can be changed diversely according to the time interval from breaking to making of the switch 2. |
